Night darkens.

Meaning: This means that the sky becomes darker or less bright during the night.

Choice of Words: Night is the period between sunset and sunrise when it is dark outside. Darkens means to become darker or less bright. This sentence emphasizes the contrast between day and night.

Alternative Expressions

The night grows darker.

Meaning: This means that the night is getting darker. It's like saying, It's getting harder to see because the night is getting darker.

Choice of Words: Night means the time when the sun has set and it is dark outside. Grows means to become larger or more. Darker means less light. When you put them together, "The night grows darker" describes the process of the night getting darker over time.

Darkness falls.

Meaning: This means that it is getting dark. It's like saying, The sun has set and it's getting harder to see.

Choice of Words: Darkness means the absence of light. Falls means to move downward. When you put them together, "Darkness falls" describes the process of darkness coming over an area.

Related Expressions